For those applications which require a lift assist flexible enough to handle parts of differing weights. The TDA Buddy Pneumatic Manipulator is available with optional pre-set weight buttons; or with an optional preselect dial - allowing the operator to simply set the dial to the proper weight for the part to be lifted. The TDA Buddy Electric Manipulator is not weight sensitive, and so handles parts of any weight within the max capacity with no adjustments needed. Please contact us with your questions, for further information, or to request literature be mailed to you.